Phone Numbering and Routing

Phone Numbering, Routing and Dial Codes

This guide details DecaTone's extension allocation, rotary speed dialing, in-call keypad commands, and special shortcodes.

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1. Extension Schema & Numbering

Administrators can configure the telephone number rules under Admin Center → Settings:

• Extension Length: Configurable between 3 digits (100–999), 4 digits (1000–9999), 5 digits, or 7 digits.
• Area Code Policy: Optional area code support (e.g. (555) 102).
• Assignment Modes:
  • User Choice: Users choose their own available number during registration.
  • Sequential: System auto-assigns numbers sequentially.
  • Random: System auto-assigns a random available extension.

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2. Rotary Speed Dial (Slots 1–9)

Users can map single rotary digits 1 through 9 to their favorite contacts under the Friends & Speed Dial menu:

• Lift the handset (dial tone starts).
• Dial digit 1 (or any slot 1–9).
• If no additional digits follow within 1.2 seconds, the call is placed immediately.

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3. In-Call Dialed Commands

While on an active call, rotary dialed digits perform rapid in-call actions without needing a hook-flash:

Dialed Digit	Function	Behavior
0	Reject Call Waiting	Rejects a secondary incoming call waiting alert directly to voicemail.
1	Accept Call Waiting / Voicemail Intercept	Accepts a secondary call waiting alert, or intercepts a live caller who is currently leaving a voicemail message.
2	Mute / Unmute Microphone	Toggles your handset microphone on/off with an in-ear confirmation chirp.
3 + [Target Extension]	Multi-Party Conference Invite	Dials and invites a third, fourth, or fifth caller into the existing group conversation (up to 5 concurrent callers).

Note

For multi-party conference calls, only the person dialing 3 + [Extension] needs to be friends with the invited caller.

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4. Special Dial Codes & Control Shortcodes

Dialed Code	Function	Description
0 (from idle)	Voicemail Inbox	Connects to your personal voicemail inbox. After a 2-second timeout, plays unread messages through the earpiece.
072	Enable Do Not Disturb	Turns on DND from the physical phone. Plays confirmation tone and hangs up.
073	Disable Do Not Disturb	Turns off DND from the physical phone. Restores normal bell ringing.
411	Switchboard Info Line	Plays switchboard system status, time, and your current extension number.
999	Echo / Audio Loopback Test	Records and echoes back your voice after 2 seconds to test microphone and earpiece levels.

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5. Call Privacy & Do Not Disturb (DND)

• Allow Anyone: Any user on the switchboard can ring your phone.
• Friends Only: Only accepted friends can ring your physical bell. Unapproved callers route directly to voicemail.
• Do Not Disturb (DND): All non-VIP calls route directly to voicemail without ringing the bells.
• Emergency Repeated Call Breakthrough: If the same friend calls twice within 3 minutes (180s) during quiet hours, their second call breaks through DND and rings the physical bell.
• VIP Status: Friends marked as VIP will always bypass DND and quiet hours.